Year	million ton-km
1970	47.9000015259
1971	57.4000015259
1972	79.6999969482
1973	85.9000015259
1974	98.1999969482
1975	74.5999984741
1976	96.3000030518
1977	119.8000030518
1978	120.5
1979	136.8000030518
1980	195.3999938965
1981	195.5
1982	170.6999969482
1983	174.3000030518
1984	179.8000030518
1985	187.1000061035
1986	192
1987	197.5
1988	193.6000061035
1989	201.1999969482
1990	213.6000061035
1991	201.8999938965
1992	206.6999969482
1993	232
1994	206.1999969482
1995	177
1996	176.6000061035
1997	220.3000030518
1998	251
1999	241
2000	296.646
2001	124.402
2002	76.419
2003	111.811
2004	123.637
2005	132.558
2006	124.583
2007	132.675
2008	131.685
2009	111.663
2010	193.301253837474
2011	192.20126
2012	180.120460072137
2013	268.710767897573
2014	261.60894
2015	243.7725665
2016	254.181413504
2017	305.102
2018	311.720805
2019	280.283172
2020	81.12423
2021	88.267613